25results about How to "Reduce emission concentration" patented technology

The invention discloses a passive nuclear steam supply system which is characterized in that two ends of a hot-section main pipeline are respectively connected with a reactor pressure vessel and a steam generator, a main pump is vertically connected with the steam generator, two ends of a cold-section main pipeline are respectively connected with the pressure vessel and the main pump, the hot-section main pipeline is provided with a first liquid level pressure tap and a second liquid level pressure tap, and the cold-section main pipeline is provided with a second liquid level pressure tap. The first liquid level pressure tap is located at the bottom of the hot section main pipeline, the second liquid level pressure tap is close to the steam generator and located at the top of the hot section main pipeline, the reactor coolant system further comprises a pressure stabilizer and a surge pipe, one end of the surge pipe is connected to one of the hot section main pipelines, and the other end of the surge pipe is connected to the bottom of the pressure stabilizer. The passive nuclear steam supply system can allow the rated power of the reactor core to be remarkably improved.

This invention relates to the field of pulverized coal conveying and dust removal technology, specifically to a pulverized coal dust removal method, comprising: S1: Constructing a dust removal system: setting up a dust cover on a conveyor belt, setting up a pressure-reducing chamber on the dust cover, installing wear-resistant baffles at the bottom of the dust cover, and installing a dust curtain inside the dust cover; installing a dust collector at the top of the dust cover; S2: Coal conveying and primary dust removal: starting the conveyor belt to transport coal, the coal falls onto the conveyor belt, and the generated dust-laden gas forms a local high-pressure zone under the obstruction of the dust curtain, causing a portion of the dust-laden gas to undergo primary filtration through the filter components on the pressure-reducing chamber; S3: Secondary dust removal: the remaining dust-laden gas in the dust cover is sucked into the dust collector, the dust-laden gas enters below the liquid surface of the dust collector, causing the pulverized coal particles to settle and form coal slurry, which is then transported outside the dust collector, and the purified gas is discharged through the outlet. This method achieves closed-loop control of the entire process from source dust suppression to end-of-pipe treatment through two-stage synergistic dust removal, improving the dust removal effect.

The utility model discloses an ion exchange resin device convenient to regenerate, which comprises a resin tank, a lower filter plate is hermetically arranged at the lower part of the resin tank, and a water collecting filter plate is hermetically arranged at the upper part of the resin tank; an overflow port and a pressure relief port are respectively formed in the top of the resin tank, and a water outlet and an air inlet are respectively formed in the bottom of the resin tank; a water inlet is formed in the upper part of the resin tank between the water collecting filter plate and the lower filter plate; and a regenerant inlet is formed in the side wall of the resin tank below the lower filter plate. The device has the advantages that the regenerant can be in full contact with resin all the time, so that the resin is fully regenerated, the utilization rate of the regenerant is increased, the consumption of the regenerant is reduced, the discharge amount and the discharge concentration of regenerated waste liquid are reduced, and the economic benefit is remarkable. The backwashing fan blows air into the resin tank to disturb the resin, so that the regeneration effect is improved, the resin can be loosened, the adsorption effect in the adsorption process is improved, and the effluent quality is improved.

The utility model discloses a layered and opposite type sinking burner for ladle roasting, including gas pipeline, primary air casing, secondary air casing and tertiary air casing, the upper end of gas pipeline is used for with gas supply pipeline intercommunication and the lower end opening forms gas spout, the gap between primary air casing and gas pipeline forms primary air channel, the gap between secondary air casing and primary air casing forms secondary air channel, the gap between tertiary air casing and secondary air casing forms tertiary air channel, and primary air channel, secondary air channel and tertiary air channel are all used for with preheating combustion air pipeline intercommunication, and the lower end opening of primary air casing forms primary air spout, and the lower end opening of secondary air casing forms secondary air spout, and the lateral wall of tertiary air casing is equipped with a plurality of tertiary air spout. Can guarantee the full mixing of gas and combustion air, and can make full use of the heat of high temperature flue gas, and can carry out effective afterburning treatment to the unburnt component remaining in high temperature flue gas.

The application discloses a kind of pollutant removal systems based on superfine grinding modified fly ash, pollutant removal system includes: boiler, gas-solid separator and drum ball mill, boiler has hearth for combustion and tail flue with hearth communication, the inner wall of drum ball mill is equipped with annular baffle, annular baffle forms modification cavity near the side of fly ash import, gas-solid separator is communicated with fly ash import to import fly ash into modification cavity, annular baffle is used to block the fly ash particles of particle size D50 greater than 20 microns, and allow the fly ash of particle size D50 less than or equal to 20 microns to flow to fly ash export through the center opening of annular baffle, modifier is mixed with fly ash retained in modification cavity and is ground to form fly ash-based adsorbent of particle size D50 less than or equal to 15 microns, fly ash-based adsorbent is discharged from fly ash-based adsorbent export and is transported to the top of hearth and is sprayed, for adsorbing and removing pollutants, to realize the efficient removal of special pollutants such as heavy metals at low cost.

The present invention belongs to the field of engine aftertreatment system, and provides a composite two-stage SCR system, control method, aftertreatment system and vehicle, wherein the system includes a first SCR, a first ASC, a DOC, a DPF, a second SCR, a second ASC, a calculation control unit, an electric heating device, a gas concentration detection unit and an exhaust temperature unit, and determines the urea injection control strategy of the first SCR and the second SCR and the working strategy of the electric heating device according to the nitrogen oxide concentration and nitrogen dioxide ratio detected by the gas concentration detection unit and the temperature obtained by the exhaust temperature unit, and controls the first SCR, the second SCR and the electric heating device to work respectively according to the determined strategy. The present invention can meet the coordinated control requirements of ultra-low nitrogen oxide emissions and nitrous oxide gas emission restrictions of diesel engines.

The utility model discloses a tail gas purification treatment device of biological oxidation gold extraction relates to tail gas purification treatment device technical field, the utility model discloses a main frame mechanism, the main frame mechanism includes the purification tower, the left side fixedly connected with the air inlet pipeline of purification tower outer surface, the top fixedly connected with the exhaust pipe of purification tower, the bottom fixedly connected with the deflector of purification tower inside, the utility model discloses a purification subassembly is set up, specifically is through setting up multilayer carbon filling layer, and carbon filling layer adopts the mixture of active carbon and modified molecular sieve, can increase the contact area and contact time of tail gas and absorption liquid and adsorbent, improve the removal efficiency to harmful gas, simultaneously, sodium hydroxide and hydrogen peroxide in absorption liquid can carry out chemical reaction and oxidation decomposition to different properties harmful gas, thereby realize the efficient purification to multiple harmful gas, effectively reduced the emission concentration of harmful substance in tail gas, and the environmental protection emission standard has been greatly improved.

The utility model discloses an ultralow temperature economizer of a secondary reheat unit, which relates to the technical field of economizers, and comprises a coal-saving shell, a sealing cover plate is arranged right above the coal-saving shell, the top end of the sealing cover plate is connected with a liquid injection pipe in a penetrating manner, a positioning mechanism is arranged right below the sealing cover plate, and the liquid injection pipe is connected with the liquid injection pipe in a penetrating manner. A positioning mechanism is arranged in the coal-saving shell, the diameter and the width of the heat exchange pipe fitting are adjusted through the positioning mechanism according to the heat exchange requirement, the requirement for positioning the two sides of the heat exchange pipe fittings of different sizes is met, a purification mechanism is arranged in the coal-saving shell, the purification mechanism is used for purifying injected flue gas, and the purification mechanism is used for purifying the flue gas. Dust in the flue gas is prevented from being directly attached to the surface of the circulating pipe to influence the heat absorption efficiency of the circulating pipe. In the using process, transverse distance adjustment is carried out through the side supporting arms arranged on the two sides, locking treatment is carried out on the side supporting arms and the transverse guide grooves through the fastening holes formed at equal intervals, and positioning treatment is carried out on the two sides of the snake-shaped heat exchange pipe according to using requirements.

The utility model belongs to the technical field of flue gas denitration, and particularly relates to a flue gas flow mixing device capable of accurately spraying ammonia, which comprises a flow mixing box body, a servo motor is fixedly connected to the bottom of the outer side wall of the mixed flow box body; the outer side wall of the servo motor is fixedly connected with an air outlet pipe. The top of the outer side wall of the servo motor is fixedly connected with an ammonia storage tank; the output end of the servo motor is fixedly connected with a hollow rotating shaft; two pairs of exhaust grooves are formed in the side wall of the hollow rotating shaft; a plurality of fan blades are fixedly connected to the outer side wall of the hollow rotating shaft; two pairs of fixing blocks are fixedly connected to the outer side wall of the hollow rotating shaft; the bottom of the outer side wall of the fixing block is fixedly connected with a connecting rope. A plurality of fixing grooves are fixedly connected to the outer side wall of the hollow rotating shaft; a cover plate is fixedly connected to the top of the outer side wall of the fixing groove. A sealing plate is fixedly connected to the bottom of the outer side wall of the connecting rope; by arranging a sealing plate, an exhaust groove and fan blades, ammonia gas can be in full contact with flue gas in the mixed flow box body when equipment runs, and efficient mixing of the ammonia gas and the flue gas is achieved.

The application provides a method for preparing sulfuric acid from pyrite concentrate powder and belongs to the technical field of resource utilization. The method comprises the following steps: (1) crushing and screening pyrite concentrate powder raw materials to obtain fine pyrite concentrate powder; (2) introducing air into a fluidized roasting furnace, suspending and roasting the fine pyrite concentrate powder in the furnace, cooling the outlet furnace gas by heat absorption, further water-moistening the residue after roasting of the fluidized roasting furnace and slag dust generated in the production process after water cooling, and then transporting the residue and the slag dust to obtain roasted sand; (3) performing dust removal, mist removal, further cooling and drying treatment on the outlet furnace gas in the step (2) to obtain SO2-containing furnace gas, spraying sulfuric acid on the SO2-containing furnace gas after air supplement, cooling, and then storing liquid into a finished product storage tank and performing drying treatment on gas; and (4) performing catalytic oxidation and heat exchange treatment on the dried gas, absorbing SO3 in the furnace gas by using concentrated sulfuric acid, performing hydrogen peroxide treatment on tail gas, and then performing mist removal and standard discharge. The method has the advantages of simple production process, environmental protection in the production process and improved resource utilization rate.

This invention provides an ammonia oxidation device for ammonia desulfurization, belonging to the field of ammonia desulfurization technology. It includes a support frame, with an ammonia addition mechanism, a processing mechanism, and an oxidation mechanism fixedly installed on the top surface of the support frame. The generation of large-particle crystals reduces crystal adhesion and blockage within the equipment, lowering maintenance costs and operational failure rates. This invention separates the ammonia addition point from the oxidation tank, establishing an independent ammonia addition tank, thus completely separating the ammonia addition and oxidation processes. The ammonium sulfite solution in the absorbent after ammonia addition can better react with SO₂ in the flue gas during absorption, avoiding the problem of uneven stratification between the absorbent and oxidation liquids in traditional integrated ammonia oxidation devices. This significantly improves SO₂ absorption efficiency, effectively reducing the SO₂ emission concentration in the flue gas and meeting increasingly stringent environmental protection requirements.

This utility model discloses a dust collection device for fused white fused alumina, comprising an air inlet pipe, a U-shaped dust removal pipe, and a buffer pipe. The U-shaped dust removal pipe and the buffer pipe are respectively connected to the top two ends of the air inlet pipe. A positioning plate is fixedly installed on the bottom inner wall of the air inlet pipe. A J-shaped air guide pipe is fixedly installed in the center of the positioning plate through an opening. A bearing is fixedly installed on the outer wall of the other end of the J-shaped air guide pipe, and a metal mesh cover is fixedly installed on the outer ring of the bearing. This utility model introduces dust-containing gas through the air inlet pipe. The gas then enters the rotating metal mesh cover through the J-shaped air guide pipe, dispersing into fine bubbles that enter the U-shaped dust removal pipe. This allows for thorough mixing of the gas and solution, greatly increasing the contact area between the gas and solution, enabling the dust to be fully mixed and adsorbed. This more efficiently removes dust from the gas, effectively reducing the dust emission concentration during the smelting of white fused alumina and minimizing pollution to the surrounding environment.

The utility model discloses a silencer with a tail gas purification device, which belongs to the technical field of excavator tail gas treatment and comprises a barrel, and end plates are arranged at two ends of the barrel to seal the barrel. A partition plate and a DOC unit are arranged in the barrel in the radial direction, the interior of the barrel is sequentially divided into a first area, a second area and a third area by the DOC unit and the partition plate, a silencing pipe is further arranged in the barrel in the axial direction and penetrates through the DOC unit and the partition plate, and a plurality of holes are formed in the outer wall, corresponding to the first area and the third area, of the silencing pipe. An air inlet is formed in the side wall of the barrel corresponding to the second area, and an exhaust tail pipe is fixedly arranged at the top of the barrel corresponding to the third area.

The application discloses an activated carbon hazardous waste treatment method and relates to the field of hazardous waste treatment, aiming to solve the problems of traditional processes in parameter control, regeneration effect and safety guarantee and the like, and specifically comprises the following steps: collecting organic functional group characteristic data and water content data of activated carbon hazardous waste to be treated; inputting a machine learning model and outputting target temperature T L of a low-temperature section of a rotary kiln, target temperature T H of a high-temperature section and minimum residence time t of the high-temperature section; controlling the low-temperature section of the rotary kiln to treat the activated carbon hazardous waste in the interval [T L -15 ℃, T L +15 ℃] according to T L , and detecting the concentration of benzene series, and when the concentration is reduced to a predetermined concentration, the activated carbon hazardous waste is transported to the high-temperature section; controlling the high-temperature section of the rotary kiln to be treated for at least t minutes in the interval [T H -20 ℃, T H +20 ℃] according to T H and t; and sending the activated carbon hazardous waste from a discharge port of the rotary kiln into a quenching tower. The application improves the recycling value of the regenerated activated carbon, and takes into account the environmental protection effect and treatment economy.

This utility model discloses a high-efficiency and environmentally friendly bulk cargo hopper structure, comprising: a main frame assembly; a feeding channel disposed above the main frame assembly; a dust removal mechanism disposed on the side wall of the feeding channel; a dust removal grid disposed at the bottom of the feeding channel; a double-hopper mechanism disposed below the dust removal grid and connected to the main frame assembly; and a telescopic chute mechanism disposed at the bottom of the double-hopper mechanism and connected to the double-hopper mechanism. The dust removal mechanism includes: a dust removal box disposed on the side wall of the feeding channel and connected to the double-hopper mechanism; a negative pressure fan disposed on the dust removal box; a filter cartridge assembly disposed inside the dust removal box; a pulse valve assembly disposed on the dust removal box and connected to the dust removal box; and a suction pipe connected at one end to the dust removal box and at the other end to the telescopic chute mechanism. Compared with the prior art, the technical solution disclosed in this utility model has high loading and unloading efficiency, can reduce the dust emission concentration in the working area, and reduce air pollution and material loss.

The present invention provides a coal-fired boiler coupled with a biomass gas combustion device and a method for arranging its combustion system, and belongs to the technical field of boiler combustion devices and methods for arranging their combustion systems. The biomass gas combustion device of the present invention is arranged in a wind box, a central air duct is fixed in a gas channel, the central air duct and the gas channel are arranged in concentric circles, a secondary air duct is fixed outside the rear end of the gas channel, the secondary air duct and the gas channel are arranged in concentric circles, a secondary air swirl device is fixed at the air inlet end of the secondary air duct, a central air swirl device is arranged at the rear end in the central air duct, a gas swirl device is provided between the rear end of the gas channel and the rear end of the central air duct, and a central air introduction channel is fixed at a position centered in front and behind the gas channel and communicates with the central air duct. Using the method for arranging the combustion system of a coal-fired boiler coupled with a biomass gas combustion device, the biomass gas combustion device is arranged between the upper pulverized coal burner and the OFA burner.

The utility model provides an adjustable cyclone separator for a coal-fired fluidized bed boiler, which comprises a barrel and an exhaust pipe, a motor is fixedly mounted on the barrel, an output shaft of the motor extends into the barrel and is fixedly provided with a rotating shaft, and two first connecting rods and two second connecting rods are fixedly mounted on the rotating shaft. By starting the motor, the first cleaning brush and the second cleaning brush, fly ash attached to the inner wall can be brushed off in time, ash deposition and scaling are prevented, the interior of the barrel can be kept in a good airflow state, the efficient separation performance of the cyclone separator is maintained, and it is ensured that the dust exhaust concentration of the coal-fired fluidized bed boiler meets the environment-friendly requirement; axial thrust and rotating force can be generated on ash in the discharging pipe, the discharging speed of the ash is increased, the ash is prevented from caking or blocking in the pipe, and it is guaranteed that the ash can be smoothly discharged into a collecting box from the discharging pipe.

The invention relates to the technical field of precise ammonia spraying control of fluidized bed boilers, in particular to a precise ammonia spraying control device and method of a circulating fluidized bed boiler, comprising a flue shell, one end of the flue shell is provided with an air inlet, the other end of the flue shell is provided with an air outlet, and the outer surface of one side of the flue shell is provided with a maintenance plate; an ammonia spraying mechanism is arranged on the inner wall of the flue shell, the ammonia spraying mechanism comprises a main pipe, multiple groups of flow guide pipes are connected to the outer surfaces of the two ends of the main pipe, and multiple groups of spraying heads are connected to the bottom ends of the multiple groups of flow guide pipes. According to the method, accurate matching of the ammonia gas and NOx is ensured, so that excessive use of the ammonia gas is reduced, and unnecessary waste and secondary pollution are avoided.

The application discloses a coal combustion dispersant and application thereof in preparation of an environment-friendly liquid coal combustion additive. A preparation method of the coal combustion dispersant comprises the following steps: S1. mixing polyvinyl alcohol, oxetane-3-methanol, a strong base catalyst and a first solvent, and performing a warming reaction to obtain a comb-shaped polymer; and S2. mixing the comb-shaped polymer, sodium di(laureth-7) citrate, a strong acid catalyst, a polymerization inhibitor and a second solvent, and performing a warming reaction to obtain the coal combustion dispersant. The coal combustion dispersant is used for preparing the environment-friendly liquid coal combustion additive. The obtained environment-friendly liquid coal combustion additive can significantly reduce pollutant emission concentration of coal combustion and improve a pollutant emission reduction rate of coal combustion.

This disclosure relates to a method for starting up a fluidized bed boiler. By spraying an adsorbent into the furnace during the boiler's start-up, NOx and SOx in the flue gas are adsorbed, reducing the emission concentrations of NOx and SOx during the boiler's startup process. This reduces the pressure on subsequent in-furnace desulfurization (CFB) and SNCR and SCR denitrification processes, thereby achieving the goal of ultra-low emissions throughout the entire process of the circulating fluidized bed boiler. This invention is simple to operate, low in cost, and does not cause secondary pollution.

The present invention discloses a flue gas re-burning low-nitrogen treatment system, which relates to the technical field of flue gas treatment, and includes a recovery unit, a flue gas treatment unit and a flue gas re-burning unit. The recovery unit includes a recovery pipeline, and the recovery pipeline is connected to a chimney. The flue gas recovered by the recovery unit through the recovery pipeline is then processed by the flue gas treatment unit. The flue gas treatment unit includes a demister and a condenser. The treated flue gas enters the flue gas re-burning unit, and a flue gas incinerator is provided in the flue gas re-burning unit, and the flue gas is re-burned and nitrogen-reduced by the flue gas incinerator. The present invention draws back about 30% of the flue gas to participate in the re-burning, and the total amount of flue gas directly discharged from the chimney to the atmosphere is correspondingly reduced; the flue gas is subjected to low-nitrogen treatment by the flue gas re-burning, and the pollutant emission concentration and emission amount are reduced, and there is no problem of secondary pollution due to re-processing, and there are no other operational safety hazards, so that the investment cost of the flue gas re-burning system is low and the treatment effect is significant.

The application discloses a high-operation-flexibility nitrogen oxide pressurized absorption device and method, wherein the absorption device takes the first layer tray of an absorption tower as an inlet absorption water quantity regulator, a self-control regulating system is additionally arranged on a water inlet pipeline of an absorption water tank, a self-control regulating valve is arranged on an inlet of a liquid ring compressor from the tower kettle, a dilute nitric acid tank and the liquid ring compressor set are integrated into a large circulation system, a process mode of increasing pipeline flow by the large circulation is adopted, and the device defects of regulating valve internal leakage are solved, so that the problems of difficult operation under different nitrogen oxide absorption loads and easy operation failure leading to non-standard emission are effectively solved.

The invention relates to the technical field of steel slag carbonization, and discloses a CO2 tail gas and metallurgical slag resource utilization system and a use method.The CO2 tail gas and metallurgical slag resource utilization system comprises a mill, a mixer, a humidifier and a carbonization reactor, and the bottom face of the inner wall of the carbonization reactor and the side face of the inner wall of the carbonization reactor are each provided with a gas box; low-pressure flue gas enters from the side surface of the carbonization reactor, high-pressure flue gas enters from the bottom surface and the side surface of the inner wall of the carbonization reactor and enters the carbonization reactor through the gas box, and the flue gas moves from bottom to top and penetrates through the humidifying mixture; flue gas kinetic energy and flue gas postures are dynamically coupled, high-pressure flue gas enters the carbonization reactor from the bottom face and the side face of the inner wall, the falling posture is changed through the high-pressure flue gas kinetic energy, materials are driven to flow, the materials make full contact with CO2 in the flue gas in the material falling process, the carbonization reaction efficiency is improved, the emission concentration of CO2 in the flue gas is reduced, and comprehensive utilization of ferrous metallurgy slag is achieved.

The utility model discloses a garbage incinerator flue gas emission pipeline which comprises an incinerator body and a pipeline body, the upper end of the side surface of the incinerator body is fixedly connected with a flue gas exhaust pipe in a penetrating mode, the lower surface of the incinerator body is fixedly connected with a base through supporting legs, and the inner side surface of the flue gas exhaust pipe is provided with a limiting groove; according to the smoke exhaust pipe, through the arrangement of the clamping blocks, the clamping grooves and other structures, when the pipeline body is installed, the limiting blocks of the pipeline body are inserted into the limiting grooves of the smoke exhaust pipe, and the clamping blocks are popped out by the spring structures and the telescopic rod structures during insertion and clamped into the clamping grooves; the pipeline body can be directly pulled out during disassembly, the clamping blocks are compressed into the grooves, the pipeline body can be directly pulled out from the interior of the smoke exhaust pipe, and cleaning or replacement is convenient.

The ultralow NOx burner comprises a peripheral gun, a central ring gun, an incandescent light, an air bellow, a brick supporting plate, an inner-layer brick and an outer-layer brick. A plurality of peripheral guns are evenly distributed on the inner wall of a combustor shell, an incandescent light is installed in the center of an inner cavity of the shell, a center ring gun is arranged around the incandescent light, a brick supporting plate is installed above the combustor shell, an inner-layer brick and an outer-layer brick are installed on the brick supporting plate, and a hollow cavity formed in the inner side of the inner-layer brick forms a primary air channel. A cavity between the inner-layer brick and the outer-layer brick is a secondary air channel, the upper portion of the outer-layer brick is closed up, and the air bellow is installed on the combustor shell and communicated with an inner cavity of the shell. According to the combustor, the limitation of single grading of a traditional combustor is broken through, and accurate control over the grading proportion and the combustion height of gas and air collaborative grading is achieved through the two layers of spray guns and the two layers of burner bricks.